دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a mechanical refrigeration system in which the refrigerant is absorbed by a suitable liquid or solid. The most CODlD1only used refrigerant is ammonia;the most commonly used absorbing medium is water. Compare compressionrefrigeration cycle.

n: the average of all the instantaneous values of current or voltage in one-half a cycle of AC electricity;equal to 0.636 times the maximum value.

n: the volume of gas needed as permanent inventory to maintain adequate underground storage reservoir pressures and deliverability rates throughout the withdrawal season.

the gas required in a storage reservoir to cycle the working gas volume.

cycling coiled tubing from a yielded position, through a transition region, and back again. Running coiled tubing from the reel into a well and back to the reel involves six bends or three cycles.

n pi: a hand tool consisting of a handle and chain that resembles the chain on a bicycle. In general, chain tongs are used for turning pipe or fittings of a diameter larger than that which a pipe wrench would fit. The chain is looped and tightened around the pipe or fitting, and the handle is used to turn the tool so that the pipe or fitting can be tightened or loosened.

n: A tool used by roughnecks on the rig floor to tighten or loosen a connection. The tool consists of a long handle and an adjustable chain that will fit a variety of pipe sizes.

a type of hand or power operated wrench used to make up connections in pipe.

a type of gas lift that uses the tubing-casing annulus for accumulation of produced liquids between lift cycles.

v: to pass from one point throughout a system and back to me starting point. For example, drilling fluid is circulated out of the suction pit, down the drill pipe and drill collars, out the bit, up the annulus, and back to the pits while drilling proceeds.

v: To cycle drilling fluid through the drill string and wellbore, returning to the mud pits. This operation is carried out during drilling and is also used to condition the mud while drilling is suspended.

establishing flow down the tubing or drill pipe and up the annulus. Reverse circulating involves injecting down the annulus and up the drill pipe.

n: see concurrent method.

n: A kind of well killing method of handling blowout. Increasing the weight of drill fluid and pumping it into the wellbore at the same time after well shuting in and requesting casing pressure. Completing well killing in a loop cycle.

n: 1. a life-support system in which the gas is recycled continually while the carbon dioxide is removed and oxygen added periodically. 2. a television installation in which the signal is transmitted by wire to a limited number of receivers.

n: Theuseful life of a coiled tubing work string is limited due to fatigue damage. This damage is caused by the repeated bending and straightening of the coiled tubing at the gooseneck and reel. The resulting failure mechanism is referred to an low cycle fat